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<head>
  <title>Test MediaRecorder Record AudioContext Node</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
  <script type="text/javascript" src="manifest.js"></script>
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<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=968109">Mozilla Bug 968109</a>

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

function setUpSource(contextType, nodeType) {
  // Use contextType to choose offline or real-time context.
  var context = contextType === 'offline'?
    new OfflineAudioContext(2 , 80920, 44100) : new AudioContext();
  var buffer = context.createBuffer(2, 80920, context.sampleRate);
  for (var i = 0; i < 80920; ++i) {
    buffer.getChannelData(0)[i] = Math.sin(1000 * 2 * Math.PI * i / context.sampleRate);
    buffer.getChannelData(1)[i] = Math.sin(1000 * 2 * Math.PI * i / context.sampleRate);
  }

  var source = context.createBufferSource();
  source.buffer = buffer;
  source.loop = true;

  source.start(0);

  // nodeType decides which node in graph should be the source of recording.
  var node;
  if (nodeType === 'source') {
    node = source;
  } else if (nodeType === 'splitter') {
    var splitter = context.createChannelSplitter();
    source.connect(splitter);
    node = splitter;
  } else if (nodeType == 'destination') {
    source.connect(context.destination);
    node = context.destination;
  }
  // Explicitly start offline context.
  if (contextType === 'offline') {
    context.startRendering();
  }

  return node;
}

function testRecord(source, done) {
  ok(source, 'source node should be ok');
  var recorder;
  var didThrow = false;
  try {
    recorder = new MediaRecorder(source);
  } catch (e) {
    didThrow = true;
  }
  ok(!didThrow, 'MediaRecorder(AudioNode) should be visible after pref turned on');

  recorder.onwarning = function() {
    ok(false, 'should not fire onwarning');
  };

  recorder.onerror = function() {
    ok(false, 'should not fire onerror');
  };

  recorder.onstop = function() {
    is(recorder.state, 'inactive', 'state should become "inactive" after calling stop()');
    done();
  };

  recorder.ondataavailable = function (e) {
    if (recorder.state == 'recording') {
      is('audio/ogg', recorder.mimeType, 'mimetype should be audio/ogg, not ' + recorder.mimeType);
      ok(e.data && e.data.size > 0, 'should get data and its length should be > 0');
      recorder.stop();
    }
  };

  try {
    recorder.start(1000);
    is('recording', recorder.state, 'state should become "recording" after calling start()');
  } catch (e) {
    didThrow = true;
  }
  ok(!didThrow, 'start() should succeed');
}

addLoadEvent(function() {
  var src = setUpSource();
  var recorder;
  var didThrow = false;
  try {
    recorder = new MediaRecorder(src);
  } catch (e) {
    didThrow = true;
  }
  ok(didThrow, 'MediaRecorder(AudioNode) should be hidden behind a pref');

  SpecialPowers.pushPrefEnv({"set": [[ 'media.recorder.audio_node.enabled', true ]]},
    function () {
      // Test with various context and source node types.
      var done1 = new Promise(function (resolve, reject) {
        testRecord(setUpSource('', 'source'), resolve);
      });
      var done2 = new Promise(function (resolve, reject) {
        testRecord(setUpSource('', 'splitter'), resolve);
      });
      var done3 = new Promise(function (resolve, reject) {
        testRecord(setUpSource('offline', 'destination'), resolve);
      });
      // Finish test after all is done.
      Promise.all([done1, done2, done3]).then(
        function () { SimpleTest.finish(); }
      );
    });
});

</script>
</pre>
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